﻿// Copyright 2005, 2006 - Morten Nielsen (www.iter.dk)
//
// This file is part of SharpMap.
// SharpMap is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// SharpMap is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License
// along with SharpMap; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

namespace ProjNet.CoordinateSystems
{
    /// <summary>
    /// Orientation of axis. Some coordinate systems use non-standard orientations. 
    /// For example, the first axis in South African grids usually points West, 
    /// instead of East. This information is obviously relevant for algorithms
    /// converting South African grid coordinates into Lat/Long.
    /// </summary>
    public enum AxisOrientationEnum : short
    {
        /// <summary>
        /// Unknown or unspecified axis orientation. This can be used for local or fitted coordinate systems.
        /// </summary>
        Other = 0,

        /// <summary>
        /// Increasing ordinates values go North. This is usually used for Grid Y coordinates and Latitude.
        /// </summary>
        North = 1,

        /// <summary>
        /// Increasing ordinates values go South. This is rarely used.
        /// </summary>
        South = 2,

        /// <summary>
        /// Increasing ordinates values go East. This is rarely used.
        /// </summary>
        East = 3,

        /// <summary>
        /// Increasing ordinates values go West. This is usually used for Grid X coordinates and Longitude.
        /// </summary>
        West = 4,

        /// <summary>
        /// Increasing ordinates values go up. This is used for vertical coordinate systems.
        /// </summary>
        Up = 5,

        /// <summary>
        /// Increasing ordinates values go down. This is used for vertical coordinate systems.
        /// </summary>
        Down = 6
    }
}
